The power required for field excitation of the main rotor in modern constant-frequency alternators is directly supplied by:

Question

Question ATPL - Airline Transport Pilot license - Aircraft General Knowledge - Airframe, Systems, Powerplant

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The voltage regulator.

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An Excitation Alternator With A Permanent Magnet Generator.

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An excitation alternator with three-phase generator and revolving diodes.

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A Direct Current Generator (exciter Dynamo).

Id 536 - ATPL - The power required for field excitation of the main rotor in modern constant-frequency alternators is directly supplied by: